Effects of adrenergic drugs on raphe unit activity in freely moving cats.

Effects of adrenergic drugs on raphe unit activity in freely moving cats.
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肾上腺素能药物对自由活动猫中缝单位活性的影响。

DOI:
10.1016/0014-2999(81)90521-5
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发表时间:
1981
影响因子:
5
通讯作者:
Jacobs,BL
Jacobs,BL
中科院分区:
医学2区
文献类型:
--
作者:
Heym,J;Trulson,ME;Jacobs,BL

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先前的研究表明,中枢性去甲肾上腺素能神经元可能对中缝背核的血清素能神经元的活性有重要影响。药理学研究表明α-肾上腺素能输入对于维持这些中缝细胞的活性是必要的。通过研究肾上腺素能药物对中缝单位活动的影响,在自由活动的猫身上检验了这个问题。选择性α - 1拮抗剂WB4101(0.5和1.0 mg/kg)、吡唑嗪(10 mg/kg)或非竞争性拮抗剂苯氧苄胺(10 mg/kg)均能产生较强的行为效应,但对raphe单位活性影响不大。低剂量α-激动剂可乐定(0.05 mg/kg)可减少肾上腺素能传递,也产生类似的结果。这些药物对中缝单位对听觉或视觉刺激的诱发反应的影响也可以忽略不计。服用d-安非他明(一种儿茶酚胺释放剂)会产生行为刻板印象,但对中脑单元的放电没有显著影响。这些数据表明,在自由运动的猫中,肾上腺素能对血清素能的中速神经元的影响非常小。这与报道的α-肾上腺素能阻滞在水合氯醛麻醉大鼠中产生的单位活性完全抑制形成对比。
Previous work has suggested that central noradrenergic neurons may have an important influence on the activity of serotonergic neurons located in the dorsal raphe nucleus. Pharmacological studies have indicated that an α-adrenergic input is necessary to maintain the activity of these raphe cells. This issue was examined in freely moving cats by studying the effects of adrenergic drugs on raphe unit activity. Systemic administration of the selectiveα1-antagonists WB4101 (0.5 and 1.0 mg/kg) or prazosin (10 mg/kg), or the non-competitive antagonist phenoxybenzamine (10 mg/kg), produced strong behavioral effects but had little effect on raphe unit activity. A low dose of the α-agonist clonidine (0.05 mg/kg), which decreases adrenergic transmission, produced similar results. These same drugs also had negligible effects on the evoked responses of raphe units to auditory or visual stimulation. Administration of d-amphetamine, a catecholamine releaser, produced behavioral stereotypy but had no significant effect on the discharge of raphe units. These data suggest that the adrenergic influence on serotonergic raphe neurons is very small in the freely moving cat. This is in contrast to the reported complete suppression of unit activity produced by α-adrenergic blockade in the chloral hydrate anesthetized rat.
苯二氮卓类药物会减弱蓝斑的单个单位活性。
DOI: 10.1016/0024-3205(80)90389-6
发表时间: 1980
期刊: Life sciences
影响因子: 6.1
作者:
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5-羟色胺和去甲肾上腺素促进脊髓运动神经元兴奋性
DOI: --
发表时间: 1980
期刊: Brain Research
影响因子: 2.9
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DOI: 10.1016/0028-3908(80)90187-2
发表时间: 1980-01-01
期刊: NEUROPHARMACOLOGY
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DOI: 10.1016/0304-3940(76)90014-8
发表时间: 1976
影响因子: 2.5
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DOI: --
发表时间: 1978
期刊: The Journal of comparative neurology
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